在急性髓性白血病细胞中,ONC212通过触发SLC35F2表达和NOXA依赖的MCL1降解来增强YM155细胞毒性
Jing-Ting Chiou1, Long-Sen Chang2
1Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
Biochemical pharmacology
|April 28, 2024
概括
在急性髓性白血病 (AML) 细胞中,ONC212通过AKT/NOX4/HuR/ATF4通路下调MCL1来诱导细胞亡. 这种机制增强了组合疗法的疗效,显示出显著的抗AML活性.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 需要阐明ONC212抗癌活性的精确机制,特别是其在急性髓性白血病 (AML) 中的亡效应.
- 以前的报道表明ONC212的潜力,但缺乏详细的机理洞察力,对其对AML细胞的作用.
研究的目的:
- 研究ONC212在急性髓性白血病 (AML) 细胞中的详细的亡机制.
- 阐明参与ONC212诱导的亡的信号通路及其与YM155.5的协同效应.
- 检查化 (HQ) 预处理对AML细胞ONC212敏感性的影响.
主要方法:
- 在U937 AML细胞中研究了ONC212对亡,MCL1水平和线粒体膜潜力的影响.
- 利用子宫外MCL1表达来评估其在缓解ONC212诱导的亡中的作用.
- 分析了包括AKT酸化,ROS生成 (NOX4),HuR转录,ATF4稳定和下游目标NOXA和SLC35F2.2在内的信号通路.
- 评估了ONC212与YM155的协同性细胞毒性以及氨酸 (HQ) 治疗前的影响.
主要成果:
- 在U937 AML细胞中,ONC212诱导了亡,MCL1下调和线粒体去极化.
- 异位MCL1表达部分从ONC212诱导的亡中拯救了细胞.
- ONC212激活了AKT,导致NOX4依赖的ROS产生和HuR转录,这稳定了ATF4mRNA,上调NOXA和SLC35F2,最终导致MCL1降解.
- ONC212与YM155协同作用,依赖于SLC35F2上调,而YM155反增强了ONC212通路.
- 在HL-60细胞和基预处理的U937细胞 (U937/HQ) 中观察到类似的机制,这些细胞对ONC212的敏感性增加,YM155细胞毒性增加.
结论:
- ONC212上调SLC35F2并通过AML细胞中的AKT/NOX4/HuR/ATF4通路触发NOXA介导的MCL1降解 (U937,U937/HQ,HL-60).
- 这种ONC212诱导的信号通路显示出抗AML活性,并增强YM155的细胞毒性.
- 这些发现为ONC212在AML的治疗潜力提供了机制基础,特别是在组合疗法中.
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